Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5ad1966bbcfd41…

MALICIOUS

PDF

43.6 KB Created: 2020-08-05 09:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 648f5bed50be0af77733e55548110450 SHA-1: b0a83874c8ed02bd7fbd366685176f623d92b17a SHA-256: bd5ad1966bbcfd414be5491ab4ca610d6d99232413bc9e7dd1144bb8ff5217cd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bronchi+definition+pdf', which is likely intended to lead the user to a malicious site. The presence of numerous shopify.com links, alongside other domains, indicates a broad attempt to distribute malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bronchi+definition+pdf
    • http://files.costaricalakehouseforsale.com/uploads/1/3/1/3/131379506/japibawomuxiz.pdf
    • http://files.sarahjnewall.com/uploads/1/3/0/7/130776680/dinojadupa_sarowun_jijilowadavit.pdf
    • http://files.transitandtales.com/uploads/1/3/0/9/130969717/3a570761402766.pdf
    • http://files.northidahoblaze.com/uploads/1/3/0/7/130775607/ronazepezaxuxa-womonegiba.pdf
    • http://kejuvuzi.msreeddanceclass.com/uploads/1/3/1/8/131856725/lumolowoxa_gugojomut_vuzok_lijurikaruze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/tivofesamujazom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/9709007233.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5487/files/nuwasolizubakujesex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/xikumabedepimatam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/wefexowufepusibumonozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/global_affine_differential_geometry_of_hypersurfaces.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/bezufilixavurasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/jakodaxozabijigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/wabadawumuxulanufavoxeliw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e50.bin
9b4900a88b649f96091249497219c1ffd18101488206c8a922af1337c86154da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E50 4872 bytes
font_01_sfnt_off00007ee7.bin
38d5202d52af2f47ec35b90354b28ada645a8a2d88643841257a7a77d4b82115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 10300 bytes

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